内容中心网络中关键技术的研究

发布时间：2018-07-02 23:42

本文选题：内容中心网络 + 移动性　；参考：《北京邮电大学》2014年硕士论文

【摘要】：如今,人们的生活已经离不开互联网了。但是随着人类社会对因特网的利用程度不断地加剧,传统的互联网架构体系的弊端却不断地显现出来。比如传统的IP地址耗尽问题,网络资源利用率问题,网络安全问题等等。虽然IPv6、p2p、CDN等技术的出现一定程度上弥补了这些缺陷,但是仍不能从根本上解决这些问题。在这样的环境下,内容中心网络诞生了。在内容中心网络的架构体系中,用户关心的不再是到哪里可以获得数据,而只用关心所想要的是什么。也就是说内容中心网络建立起了一个真正以数据内容为核心的网络体系,取代了已经统治了半个世纪的TCP/IP架构体系,也即以IP地址为核心的网络。在内容中心网络里,形成了一套以内容的发布/订阅式的模式,不仅可以实现网络资源的高效利用,也能从根本上避免一些现有的安全隐患。但是,内容中心网络只是一种新兴的网络架构体系,仍然有很多地方需要进一步的科学研究。本文立足于此,首先分析了当前的互联网形势,以及存在的核心问题,指出了内容中心网络是一种发展趋势。然后详细介绍了内容中心网络的基本网络架构,并从架构中的一些关键元素中分析了其一些优势与挑战。然后从内容中心网络需要实际解决的几个关键技术点着手,本文从移动性方面做了一些分析,指出内容中心网络特别适合在无线自组织网络中应用,接着从网络的关键技术点,路由转发机制和缓存策略入手,分析和比较了几种转发机制。同时也在缓存方面结合内容中心网络中基本的原理,设计了一种新的缓存策略。最后借助基于NS-3的ndnSIM仿真工具,对转发和缓存算法进行了仿真和验证。实验结果表明,该算法有着良好的性能表现。
[Abstract]:Nowadays, people's lives have been inseparable from the Internet. However, with the increasing use of the Internet in human society, the drawbacks of the traditional Internet architecture are constantly emerging. For example, the traditional IP address exhaustion problem, network resource utilization problem, network security problem and so on. Although the emergence of IPv6 p2pCDN and other technologies to some extent make up for these defects, but still can not fundamentally solve these problems. In this environment, the content center network was born. In the architecture of content-centric network, users are not concerned with where to get data, but only with what they want. That is to say, the content center network has established a real network system with data content as the core, replacing the TCP / IP architecture that has ruled for half a century, that is, the network with IP address as the core. In the content-centric network, a set of publish / subscribe mode based on content is formed, which can not only realize the efficient use of network resources, but also avoid some existing security hidden dangers. However, the content-centric network is only a new network architecture, and there are still many places for further scientific research. Based on this, this paper first analyzes the current Internet situation and the existing core problems, and points out that the content-centric network is a trend of development. Then the basic network architecture of content-centric network is introduced in detail, and some advantages and challenges are analyzed from some key elements in the architecture. Then, starting from several key technology points that need to be solved in practice, this paper makes some analysis from the aspect of mobility, and points out that content center network is especially suitable for application in wireless ad hoc network, and then from the key technology point of network, The routing forwarding mechanism and cache strategy are analyzed and compared. At the same time, a new caching strategy is designed based on the basic principle of content-centric network. Finally, NS-3 based ndnSIM simulation tool is used to simulate and verify the forwarding and caching algorithms. Experimental results show that the algorithm has good performance.
【学位授予单位】：北京邮电大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP393.02

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